New Twiddle

components.inner-component-one.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.inner-component-two.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.outer-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

{{#outer-component as |oc|}}
  {{#oc.inner-component-one}}
	  <p>inner 1</p>
  {{/oc.inner-component-one}}
  
  {{#oc.inner-component-two}}
	  <p>inner 2</p>
  {{/oc.inner-component-two}}
{{/outer-component}}

templates.components.inner-component-one.hbs

{{#if hasBlock}}
  {{yield}}
{{else}}
  <p>default inner-component-one content</p>
{{/if}}

templates.components.inner-component-two.hbs

{{#if hasBlock}}
  {{yield}}
{{else}}
  <p>default inner-component-one content</p>
{{/if}}

templates.components.outer-component.hbs

<p>Outer component here</p>

{{yield (hash inner-component-one=(component "inner-component-one"))}}

{{yield (hash inner-component-two=(component "inner-component-two"))}}

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}